Class: ProtXMLToGFFTool
Defined Under Namespace
Classes: CDSInfo
Instance Attribute Summary
Attributes inherited from Tool
#option_parser, #options, #options_defined_by_user
Instance Method Summary collapse
- #add_putative_nterm_to_gff(gff_records, peptide_seq, protein_seq, protein_info, prot_id, peptide_count, dna_sequence, genomedb) ⇒ Object
- #cds_info_from_fasta(fasta_entry) ⇒ Object
- #fragment_coords_from_protein_coords(pepstart, pepend, gene_start, gene_end, coding_sequences) ⇒ Object
- #generate_fragment_gffs_for_coords(coords, protein_info, pep_id, peptide_seq, genomedb, name = "fragment") ⇒ Object
- #generate_gff_for_peptide_mapped_to_protein(protein_seq, peptide_seq, protein_info, prot_id, peptide_prob, peptide_count, dna_sequence, genomedb = nil) ⇒ Object
- #generate_protein_gff(protein_name, entry_info, prot_prob, prot_id) ⇒ Object
- #get_cterm_coords_for_peptide(peptide_genomic_start, peptide_genomic_end, peptide_seq, protein_seq, strand) ⇒ Object
- #get_dna_sequence(protein_info, genomedb) ⇒ Object
- #get_fasta_record(protein_name, fastadb) ⇒ Object
- #get_nterm_peptide_for_peptide(peptide_seq, protein_seq) ⇒ Object
-
#get_peptide_coordinates(prot_seq, pep_seq, protein_info, gene_seq) ⇒ Object
Returns a 4-mer [genomic_start,fragment1_end(or0),frag2_start(or0),genomic_end].
-
#get_peptide_coordinates_from_transcript_info(prot_seq, pep_seq, protein_info, gene_seq) ⇒ Object
gene_seq should already have been reverse_complemented if on reverse strand.
- #get_peptide_coordinates_sixframe(prot_seq, pep_seq, protein_info) ⇒ Object
- #get_start_codon_coords_for_peptide(peptide_genomic_start, peptide_genomic_end, peptide_seq, protein_seq, strand) ⇒ Object
-
#initialize ⇒ ProtXMLToGFFTool
constructor
A new instance of ProtXMLToGFFTool.
- #is_new_genome_location(candidate_entry, existing_entries) ⇒ Object
- #peptide_gff_is_duplicate(peptide_gff, peptides_covered_genome) ⇒ Object
- #peptide_is_in_sixframe(pep_seq, gene_seq) ⇒ Object
- #peptide_nodes(protein_node) ⇒ Object
- #protein_names(protein_node) ⇒ Object
Methods inherited from Tool
#add_boolean_option, #add_value_option, #check_options, #database_info, default_output_path, extension_from_filename, #jobid_prefix, #jobid_prefix=, #method_missing, #run, #supported_options
Constructor Details
#initialize ⇒ ProtXMLToGFFTool
Returns a new instance of ProtXMLToGFFTool.
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# File 'lib/protk/protxml_to_gff_tool.rb', line 5 def initialize super([:explicit_output]) @option_parser. = "Create a gff containing peptide Observations.\n\nUsage: protxml_to_gff.rb " add_value_option(:database,nil,['-d filename','--database filename','Database used for ms/ms searches (Fasta Format)']) add_value_option(:genome,nil,['-g filename','--genome filename', 'Nucleotide sequences for scaffolds (Fasta Format)']) add_value_option(:coords_file,nil,['-c filename','--coords-file filename.gff3', 'If genomic coordinates are not encoded in protein db entries look them up from a supplied gff file']) # add_value_option(:contig_regex,nil,['--contig-regex expression','Regular expression with a single capture group to get contig ids from protein ids']) add_value_option(:protein_find,nil,['-f term','--find term', 'Restrict output to proteins whose name matches the specified string']) add_value_option(:nterm_minlen,7,['-n len','--nterm-min-len len', 'Only include inferred N-terminal sequences if longer than len']) add_boolean_option(:skip_fasta_indexing,false,['--skip-index','Don\'t index database (Index should already exist)']) add_boolean_option(:stack_charge_states,false,['--stack-charge-states','Different peptide charge states get separate gff entries']) add_boolean_option(:collapse_redundant_proteins,false,['--collapse-redundant-proteins','Proteins that cover genomic regions already covered will be skipped']) add_value_option(:peptide_probability_threshold,0.95,['--threshold prob','Peptide Probability Threshold (Default 0.95)']) add_value_option(:protein_probability_threshold,0.99,['--prot-threshold prob','Protein Probability Threshold (Default 0.99)']) end |
Dynamic Method Handling
This class handles dynamic methods through the method_missing method in the class Tool
Instance Method Details
#add_putative_nterm_to_gff(gff_records, peptide_seq, protein_seq, protein_info, prot_id, peptide_count, dna_sequence, genomedb) ⇒ Object
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# File 'lib/protk/protxml_to_gff_tool.rb', line 449 def add_putative_nterm_to_gff(gff_records,peptide_seq,protein_seq,protein_info,prot_id,peptide_count,dna_sequence,genomedb) pep_id = "#{prot_id}.p#{peptide_count.to_s}" signal_peptide = get_nterm_peptide_for_peptide(peptide_seq,protein_seq) if signal_peptide $stdout.write "Nterm\t#{signal_peptide}\t#{protein_info.name}\t#{protein_seq}\n" raw_signal_peptide=signal_peptide.sub(/\(cleaved\)/,"") # Get raw signal_peptide sequence signal_peptide_coords=get_peptide_coordinates(protein_seq,raw_signal_peptide,protein_info,dna_sequence) if signal_peptide_coords signal_peptide_coords.each do |spcoords| signal_peptide_gff = generate_fragment_gffs_for_coords(spcoords,protein_info,pep_id,raw_signal_peptide,genomedb,"signalpeptide") gff_records += signal_peptide_gff end end end end |
#cds_info_from_fasta(fasta_entry) ⇒ Object
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# File 'lib/protk/protxml_to_gff_tool.rb', line 72 def cds_info_from_fasta(fasta_entry) info=CDSInfo.new info.fasta_id=fasta_entry positions = fasta_entry.identifiers.description.split(' ').collect { |coords| coords.split('|').collect {|pos| pos.to_i} } info.coding_sequences=[] info.gene_id if ( positions.length < 1 ) raise EncodingError elsif ( positions.length > 1) info.coding_sequences = positions[1..-1] end info.start = positions[0][0] info.end = positions[0][1] info.scaffold=fasta_entry.entry_id.scan(/(scaffold_?\d+)_/)[0][0] info.name = fasta_entry.entry_id.scan(/lcl\|(.*)/)[0][0] if fasta_entry.entry_id =~ /frame/ info.frame=info.name.scan(/frame_(\d)/)[0][0] info.strand = (info.frame.to_i > 3) ? '-' : '+' info.is_sixframe = true else info.strand = (info.name =~ /rev/) ? '-' : '+' info.gene_id=info.name.scan(/_\w{3}_(.*)\.t/)[0][0] info.is_sixframe = false end info end |
#fragment_coords_from_protein_coords(pepstart, pepend, gene_start, gene_end, coding_sequences) ⇒ Object
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# File 'lib/protk/protxml_to_gff_tool.rb', line 152 def fragment_coords_from_protein_coords(pepstart,pepend,gene_start,gene_end,coding_sequences) sorted_cds = coding_sequences.sort { |a, b| a[0] <=> b[0] } # Assume positive strand pi_start=pepstart*3+gene_start-1 pi_end=pepend*3+gene_start-1 fragments=[] p_i = pi_start #Initially we are looking for the first fragment finding_start=true sorted_cds.each_with_index do |cds_coords, i| cds_start=cds_coords[0] cds_end = cds_coords[1] if cds_end < p_i # Exon is before index in sequence and doesn't contain p_i if sorted_cds.length <= i+1 require 'debugger';debugger end next_coords = sorted_cds[i+1] intron_offset = ((next_coords[0]-cds_end)-1) p_i+=intron_offset pi_end+=intron_offset if !finding_start # This is a middle exon fragments << [cds_start,cds_end] end else if finding_start if ( pi_end <= cds_end) #Whole peptide contained in a single exon fragments << [p_i+1,pi_end] break; end fragments << [p_i+1,(cds_end)] next_coords = sorted_cds[i+1] intron_offset = ((next_coords[0]-cds_end)-1) p_i+=intron_offset pi_end+=intron_offset p_i = pi_end finding_start=false else # A terminal exon # require 'debugger';debugger fragments << [(cds_start),(p_i)] break; end end end [fragments] end |
#generate_fragment_gffs_for_coords(coords, protein_info, pep_id, peptide_seq, genomedb, name = "fragment") ⇒ Object
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# File 'lib/protk/protxml_to_gff_tool.rb', line 270 def generate_fragment_gffs_for_coords(coords,protein_info,pep_id,peptide_seq,genomedb,name="fragment") scaff = get_fasta_record(protein_info.scaffold,genomedb) scaffold_seq = Bio::Sequence::NA.new(scaff.seq) fragment_phase = 0 ordered_coords= protein_info.strand=='+' ? coords : coords.reverse if name=="CDS" frag_id="#{pep_id}.fg" else frag_id="#{pep_id}.sp" end gff_lines = ordered_coords.collect do |frag_start,frag_end| frag_naseq = scaffold_seq[frag_start-1..frag_end-1] begin frag_frame = fragment_phase+1 frag_seq = nil if ( protein_info.strand=='-') frag_seq = frag_naseq.reverse_complement.translate(frag_frame) else frag_seq = frag_naseq.translate(frag_frame) end rescue if frag_naseq.length > 1 puts "Unable to translate #{frag_naseq}" # require 'debugger' end frag_seq="*" end fragment_record=Bio::GFF::GFF3::Record.new(seqid = protein_info.scaffold,source="MSMS", feature_type=name,start_position=frag_start,end_position=frag_end,score='', strand=protein_info.strand,frame=fragment_phase,attributes=[["Parent",pep_id],["ID",frag_id],["Name",frag_seq]]) remainder=(frag_naseq.length-fragment_phase) % 3 fragment_phase=(3-remainder) % 3 fragment_record end concat_seq=nil coords.each do |frag_start,frag_end| frag_naseq = scaffold_seq[frag_start-1..frag_end-1] concat_seq += frag_naseq unless concat_seq == nil concat_seq = frag_naseq if concat_seq==nil end check_seq = protein_info.strand=='-' ? concat_seq.reverse_complement.translate : concat_seq.translate if ( check_seq != peptide_seq) # require 'debugger';debugger puts "Fragment seqs not equal to peptide seqs" end return gff_lines end |
#generate_gff_for_peptide_mapped_to_protein(protein_seq, peptide_seq, protein_info, prot_id, peptide_prob, peptide_count, dna_sequence, genomedb = nil) ⇒ Object
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# File 'lib/protk/protxml_to_gff_tool.rb', line 393 def generate_gff_for_peptide_mapped_to_protein(protein_seq,peptide_seq,protein_info,prot_id,peptide_prob,peptide_count,dna_sequence,genomedb=nil) prot_seq = protein_seq pep_seq = peptide_seq peptide_coords = get_peptide_coordinates(prot_seq,pep_seq,protein_info,dna_sequence) if ( peptide_coords==nil ) # Return value of nil means the entry is a predicted transcript that should already be covered by 6-frame return [] end gff_records=[] # Now convert peptide coordinate to genome coordinates # And create gff lines for each match peptide_coords.each do |coords| # require 'debugger';debugger pep_genomic_start = coords.first[0] pep_genomic_end = coords.last[1] pep_id = "#{prot_id}.p#{peptide_count.to_s}" pep_attributes = [["ID",pep_id],["Parent",prot_id],["Name",pep_seq]] pep_gff_line = Bio::GFF::GFF3::Record.new(seqid = protein_info.scaffold,source="MSMS", feature_type="peptide",start_position=pep_genomic_start,end_position=pep_genomic_end,score=peptide_prob, strand=protein_info.strand,frame=nil,attributes=pep_attributes) # For standard peptides frag_gffs = generate_fragment_gffs_for_coords(coords,protein_info,pep_id,peptide_seq,genomedb,"CDS") gff_records += [pep_gff_line] + frag_gffs # require 'debugger';debugger # For peptides with only 1 tryptic terminus start_codon_coords=get_start_codon_coords_for_peptide(pep_genomic_start,pep_genomic_end,peptide_seq,protein_seq,protein_info.strand) if start_codon_coords start_codon_gff = Bio::GFF::GFF3::Record.new(seqid = protein_info.scaffold,source="MSMS", feature_type="start_codon",start_position=start_codon_coords[0],end_position=start_codon_coords[1],score='', strand=protein_info.strand,frame=nil,attributes=["Parent",pep_id]) gff_records+=[start_codon_gff] end cterm_coords = get_cterm_coords_for_peptide(pep_genomic_start,pep_genomic_end,peptide_seq,protein_seq,protein_info.strand) if ( cterm_coords ) cterm_gff = Bio::GFF::GFF3::Record.new(seqid = protein_info.scaffold,source="MSMS", feature_type="cterm",start_position=cterm_coords[0],end_position=cterm_coords[1],score='', strand=protein_info.strand,frame=nil,attributes=["Parent",pep_id]) gff_records+=[start_codon_gff] end end # puts gff_records gff_records end |
#generate_protein_gff(protein_name, entry_info, prot_prob, prot_id) ⇒ Object
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# File 'lib/protk/protxml_to_gff_tool.rb', line 122 def generate_protein_gff(protein_name,entry_info,prot_prob,prot_id) prot_qualifiers = {"source" => "MSMS", "score" => prot_prob, "ID" => prot_id} prot_attributes = [["ID",prot_id],["Name",entry_info.name]] prot_gff_line = Bio::GFF::GFF3::Record.new(seqid = entry_info.scaffold,source="MSMS",feature_type="protein", start_position=entry_info.start,end_position=entry_info.end,score=prot_prob,strand=entry_info.strand,frame=nil,attributes=prot_attributes) prot_gff_line end |
#get_cterm_coords_for_peptide(peptide_genomic_start, peptide_genomic_end, peptide_seq, protein_seq, strand) ⇒ Object
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# File 'lib/protk/protxml_to_gff_tool.rb', line 349 def get_cterm_coords_for_peptide(peptide_genomic_start,peptide_genomic_end,peptide_seq,protein_seq,strand) if ( (peptide_seq[-1]!='K' && peptide_seq[-1]!='R' ) ) codon_coord = (strand=='+') ? peptide_genomic_end-3 : peptide_genomic_start+1 # require 'debugger';debugger return [codon_coord,codon_coord+2] else return nil end end |
#get_dna_sequence(protein_info, genomedb) ⇒ Object
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# File 'lib/protk/protxml_to_gff_tool.rb', line 130 def get_dna_sequence(protein_info,genomedb) scaffold_sequence = get_fasta_record(protein_info.scaffold,genomedb) gene_sequence = scaffold_sequence.naseq.to_s[(protein_info.start-1)..protein_info.end] if ( protein_info.strand == "-") gene_sequence = Bio::Sequence::NA.new(gene_sequence).reverse_complement end gene_sequence end |
#get_fasta_record(protein_name, fastadb) ⇒ Object
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# File 'lib/protk/protxml_to_gff_tool.rb', line 40 def get_fasta_record(protein_name,fastadb) # puts "Looking up #{protein_name}" entry = fastadb.get_by_id protein_name if ( entry == nil) puts "Failed lookup for #{protein_name}" raise KeyError end entry end |
#get_nterm_peptide_for_peptide(peptide_seq, protein_seq) ⇒ Object
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# File 'lib/protk/protxml_to_gff_tool.rb', line 362 def get_nterm_peptide_for_peptide(peptide_seq,protein_seq) pi=protein_seq.index(peptide_seq) if ( pi>0 && (protein_seq[pi-1]!='K' && protein_seq[pi-1]!='R' && protein_seq[pi]!='M') ) # Since trypsin sometimes cleaves before P (ie breaking the rule) # we don't check for it and assume those cases are real tryptic termini reverse_leader_seq=protein_seq[0..pi].reverse mi=reverse_leader_seq.index('M') if ( mi==nil ) puts "No methionine found ahead of peptide sequence. Unable to determine n-term sequence" return nil end mi=pi-mi ntermseq=protein_seq[mi..(pi-1)] # if ( ntermseq.length < minlen ) # return nil # end # $STDOUT.write protein_seq[mi..(pi+peptide_seq.length-1)] # require 'debugger';debugger full_seq_with_annotations = "#{ntermseq}(cleaved)#{protein_seq[(pi..(pi+peptide_seq.length-1))]}" return full_seq_with_annotations else return nil end end |
#get_peptide_coordinates(prot_seq, pep_seq, protein_info, gene_seq) ⇒ Object
Returns a 4-mer [genomic_start,fragment1_end(or0),frag2_start(or0),genomic_end]
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# File 'lib/protk/protxml_to_gff_tool.rb', line 261 def get_peptide_coordinates(prot_seq,pep_seq,protein_info,gene_seq) if ( protein_info.is_sixframe) return get_peptide_coordinates_sixframe(prot_seq,pep_seq,protein_info) else return get_peptide_coordinates_from_transcript_info(prot_seq,pep_seq,protein_info,gene_seq) end end |
#get_peptide_coordinates_from_transcript_info(prot_seq, pep_seq, protein_info, gene_seq) ⇒ Object
gene_seq should already have been reverse_complemented if on reverse strand
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# File 'lib/protk/protxml_to_gff_tool.rb', line 208 def get_peptide_coordinates_from_transcript_info(prot_seq,pep_seq,protein_info,gene_seq) # if ( peptide_is_in_sixframe(pep_seq,gene_seq)) # Peptide is in 6-frame but on a predicted transcript # return nil # else # puts "Found a gap #{protein_info.fasta_id}" if protein_info.strand=='-' pep_index = prot_seq.reverse.index(pep_seq.reverse) if pep_index==nil # require 'debugger';debugger puts "Warning: Unable to find peptide #{pep_seq} in this protein! #{protein_info}" return nil end pep_start_i = prot_seq.reverse.index(pep_seq.reverse)+1 # Plus 1 because on reverse stand stop-codon will be at the beginning of the sequence (when read forwards). Need to eliminate it. else pep_start_i = prot_seq.index(pep_seq) if pep_start_i==nil # require 'debugger';debugger puts "Warning: Unable to find peptide #{pep_seq} in this protein! #{protein_info}" return nil end end pep_end_i = pep_start_i+pep_seq.length return fragment_coords_from_protein_coords(pep_start_i,pep_end_i,protein_info.start,protein_info.end,protein_info.coding_sequences) # end end |
#get_peptide_coordinates_sixframe(prot_seq, pep_seq, protein_info) ⇒ Object
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# File 'lib/protk/protxml_to_gff_tool.rb', line 238 def get_peptide_coordinates_sixframe(prot_seq,pep_seq,protein_info) if ( protein_info.strand == '-' ) prot_seq = prot_seq.reverse pep_seq = pep_seq.reverse end start_indexes = [0] prot_seq.scan /#{pep_seq}/ do |match| start_indexes << prot_seq.index(match,start_indexes.last) end start_indexes.delete_at(0) start_indexes.collect do |si| pep_genomic_start = protein_info.start + 3*si pep_genomic_end = pep_genomic_start + 3*pep_seq.length - 1 [[pep_genomic_start,pep_genomic_end]] end end |
#get_start_codon_coords_for_peptide(peptide_genomic_start, peptide_genomic_end, peptide_seq, protein_seq, strand) ⇒ Object
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# File 'lib/protk/protxml_to_gff_tool.rb', line 330 def get_start_codon_coords_for_peptide(peptide_genomic_start,peptide_genomic_end,peptide_seq,protein_seq,strand) pi=protein_seq.index(peptide_seq) if ( protein_seq[pi]=='M' ) is_tryptic=false if ( pi>0 && (protein_seq[pi-1]!='K' && protein_seq[pi-1]!='R') ) is_tryptic=true elsif (pi==0) is_tryptic=true end return nil unless is_tryptic start_codon_coord = (strand=='+') ? peptide_genomic_start : peptide_genomic_end-2 # require 'debugger';debugger return [start_codon_coord,start_codon_coord+2] else return nil end end |
#is_new_genome_location(candidate_entry, existing_entries) ⇒ Object
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# File 'lib/protk/protxml_to_gff_tool.rb', line 103 def is_new_genome_location(candidate_entry,existing_entries) # puts existing_entries # require 'debugger';debugger # genes=existing_entries.collect { |e| e.gene_id }.compact # if genes.include?(candidate_entry.gene_id) # return false # end existing_entries.each do |existing| return false if existing.gene_id==candidate_entry.gene_id return false if existing.overlap(candidate_entry) end return true end |
#peptide_gff_is_duplicate(peptide_gff, peptides_covered_genome) ⇒ Object
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# File 'lib/protk/protxml_to_gff_tool.rb', line 467 def peptide_gff_is_duplicate(peptide_gff,peptides_covered_genome) nameindex = peptide_gff.attributes.index {|obj| obj[0]=="Name" } pep_seq = peptide_gff.attributes[nameindex][1] existing = peptides_covered_genome[pep_seq] return true if existing==peptide_gff.start return false end |
#peptide_is_in_sixframe(pep_seq, gene_seq) ⇒ Object
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# File 'lib/protk/protxml_to_gff_tool.rb', line 142 def peptide_is_in_sixframe(pep_seq,gene_seq) gs=Bio::Sequence::NA.new(gene_seq) (1..6).each do |frame| if gs.translate(frame).index(pep_seq) return true end end return false end |
#peptide_nodes(protein_node) ⇒ Object
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# File 'lib/protk/protxml_to_gff_tool.rb', line 35 def peptide_nodes(protein_node) return protein_node.find('protxml:peptide','protxml:http://regis-web.systemsbiology.net/protXML') end |
#protein_names(protein_node) ⇒ Object
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# File 'lib/protk/protxml_to_gff_tool.rb', line 26 def protein_names(protein_node) indis_proteins = protein_node.find('protxml:indistinguishable_protein','protxml:http://regis-web.systemsbiology.net/protXML') prot_names = [protein_node['protein_name']] for protein in indis_proteins prot_names += [protein['protein_name']] end prot_names end |